It appears that my grease gun does not have an adjustable tip. It can't rotate to let go of the zerk. So I just pulled as hard as I could and the zerk came out. But I still don't know how to proceed from here. Does anyone have a video to show how to go from here? Again, I'm so sorry for my ignorance - I grew up in suburbia and never had access to any information about this stuff but now I'm completely dedicated to growing my own food. The first videos that come up don't show what you are supposed to do if you don't have the right items from the start.